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  <title>Description of filter_visualize_3D</title>
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<h1>filter_visualize_3D
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<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>Used to help visualize a 3D filter.</strong></div>

<h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>function filter_visualize_3D( F, frac ) </strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre class="comment"> Used to help visualize a 3D filter. 

 Dark lobes correspond to negative areas.  Surfaces shown are drawn at a percentage of
 the peak filter response detemined by frac.  

 INPUTS
   F       - 3D filter to visualize
   frac    - frac of max value of F at which to draw surfaces.

 DATESTAMP
   29-Sep-2005  2:00pm

 See also <a href="filter_visualize_2D.html" class="code" title="function filter_visualize_2D( F, plotline )">FILTER_VISUALIZE_2D</a></pre></div>

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<h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
This function calls:
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This function is called by:
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<li><a href="filter_DOOG_3D.html" class="code" title="function dG = filter_DOOG_3D( r, sigmas, nderivs, show )">filter_DOOG_3D</a>	3D difference of offset Gaussian (DooG) filters.</li><li><a href="filter_gauss_nD.html" class="code" title="function G = filter_gauss_nD( dims, mu, C, show )">filter_gauss_nD</a>	n-dimensional Gaussian filter.</li></ul>
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